inertia
in-er-tia
noun
A tendency to remain inactive or unwilling to change or move.
"Overcoming the team's inertia was a real challenge."
noun
The property of matter resisting changes to its state of motion or rest.
"The car's inertia made it hard to stop quickly."
Thesaurus
Synonyms: inactivity, inactiveness
Antonyms: activeness, activity